Portion of a footwear upper



FIG. 1 is a perspective view of the portion of a footwear upper embodying the new design;

FIG. 2 is an enlarged top plan view thereof;

FIG. 3 is enlarged right side view thereof;

FIG. 4 is enlarged left side view thereof;

FIG. 5 is a reduced front view thereof; and,

FIG. 6 is a reduced back view thereof.

FIGS. 1-6 show features of an article of footwear in phantom lines. These features are shown for environmental purposes and do not form any part of the claimed design. Further, the phantom lines immediately adjacent the solid-line portions of the design form the boundary of the design, with the phantom lines forming no part of the claimed design. 

The ornamental design for portion of a footwear upper, as shown and described. 